BACKGROUND:Tubba Blubba was a big purple Clubba, but despite his big body he was actually a really sensitive guy. That's why the boos loved scaring him. When Bowser got the Star Rod and captured the Star Spirits, he made Tubba Blubba the guard of Skolar, the third Star
Spirit. To make sure Mario would never retrieve Skolar, Bowser made Tubba Blubba
invincible by taking out Tubba's heart. The heart got hidden under a mysterious
windmill.
Tubba Blubba wasn't scared of the Boos anymore, now that he was invincible. He started
eating them! But Mario managed to uncover the secret of his invincibility. When Mario
was about to beat Tubba Blubba's heart, it fled back into Tubba's body. After that,
Tubba Blubba was soon defeated and Mario rescued Skolar. At least the Boos decided to
stop scaring Tubba Blubba.